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You searched for: maartens AND mediatype:texts
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[texts]On The 5D Extra-Force according to Basini-Capozziello-Leon Formalism and five important features: Kar-Sinha Gravitational Bending of Light, Chung-Freese Superluminal Behaviour, Maartens-Clarkson Black Strings, Experimental measures of Extra Dimensions on board International Space Station(ISS) and the existence of the Particle $Z$ due to a Higher Dimensional spacetime - Fernando Rego Loup
We use the Conformal Metric as described in Kar-Sinha work on Gravitational Bending of Light in a 5D Spacetime to recompute the equations of the 5D Force in Basini-Capozziello-Leon Formalism and we arrive at a result that possesses some advantages. The equations of the Extra Force as proposed by Leon are now more elegant in Conformal Formalism and many algebraic terms can be simplified or even suppressed...
Downloads: 3
[texts]Kinematics and Dynamics of $f(R)$ Theories of Gravity - Steve Rippl
We generalise the equations governing relativistic fluid dynamics given by Ehlers and Ellis for general relativity, and by Maartens and Taylor for quadratic theories, to generalised $f(R)$ theories of gravity. In view of the usefulness of this alternative framework to general relativity, its generalisation can be of potential importance for deriving analogous results to those obtained in general relativity...
Downloads: 3
[texts]Local freedom in the gravitational field revisited - María Jesús Pareja
Maartens {\it et al.}\@ gave a covariant characterization, in a 1+3 formalism based on a perfect fluid's velocity, of the parts of the first derivatives of the curvature tensor in general relativity which are ``locally free'', i.e. not pointwise determined by the fluid energy momentum and its derivative. The full decomposition of independent curvature derivative components given in earlier work on the spinor approach to the equivalence problem enables analogous general results to be stated for a...
Downloads: 6
[texts]Shear Dynamics in Bianchi I Cosmology - Diego Caceres
We present the exact equation for evolution of Bianchi I cosmological model, considering a non-tilted perfect fluid in a matter dominated universe. We use the definition of shear tensor and later we prove it is consistent with the evolution equation for shear tensor obtained from Ricci identities and widely known in literature [3], [5], [9]. Our result is compared with the equation given by Ellis and van Elst in [3] and Tsagas, Challinor and Maartens [5]...
Downloads: 26
[texts]Compact anisotropic spheres with prescribed energy density - M. Chaisi
New exact interior solutions to the Einstein field equations for anisotropic spheres are found. We utilise a procedure that necessitates a choice for the energy density and the radial pressure. This class contains the constant density model of Maharaj and Maartens (Gen. Rel. Grav., Vol 21, 899-905, 1989) and the variable density model of Gokhroo and Mehra (Gen. Rel. Grav., Vol 26, 75-84, 1994) as special cases...
Downloads: 2
[texts]Near-Horizon Solution for DGP Perturbations - Ignacy Sawicki
We develop a scaling ansatz for the master equation in Dvali, Gabadadze, Porrati cosmologies, which allows us to solve the equations of motion for perturbations off the brane during periods when the on-brane evolution is scale-free. This allows us to understand the behavior of the gravitational potentials outside the horizon at high redshifts and close to the horizon today. We confirm that the results of Koyama and Maartens are valid at scales relevant for observations such as galaxy-ISW correla...
Downloads: 7
[texts]Anti-Newtonian universes do not exist - Lode Wylleman
In a paper by Maartens, Lesame and Ellis (Class. Quant. Grav. 15, 1005) it was shown that irrotational dust solutions with vanishing electric part of the Weyl tensor are subject to severe integrability conditions and it was conjectured that the only such solutions are FLRW spacetimes. In their analysis the possibility of a cosmological constant Lambda was omitted. The conjecture is proved, irrespective as to whether Lambda is zero or not, and qualitative differences with the case of vanishing ma...
Downloads: 10
[texts]Dynamical Systems Approach to Magnetised Cosmological Perturbations - Stacey Hobbs
Assuming a large-scale homogeneous magnetic field, we follow the covariant and gauge-invariant approach used by Tsagas and Barrow to describe the evolution of density and magnetic field inhomogeneities and curvature perturbations in a matter-radiation universe. We use a two parameter approximation scheme to linearize their exact non-linear general-relativistic equations for magneto-hydrodynamic evolution...
Downloads: 4
[texts]Anisotropy and inflation in Bianchi I brane worlds - J. M. Aguirregabiria
After a more general assumption on the influence of the bulk on the brane, we extend some conclusions by Maartens et al. and Santos et al. on the asymptotic behavior of Bianchi I brane worlds. As a consequence of the nonlocal anisotropic stresses induced by the bulk, in most of our models, the brane does not isotropize and the nonlocal energy does not vanish in the limit in which the mean radius goes to infinity...
Downloads: 5
[texts]Solar system tests of brane world models - Christian G. Boehmer
The classical tests of general relativity (perihelion precession, deflection of light, and the radar echo delay) are considered for the Dadhich, Maartens, Papadopoulos and Rezania (DMPR) solution of the spherically symmetric static vacuum field equations in brane world models. For this solution the metric in the vacuum exterior to a brane world star is similar to the Reissner-Nordstrom form of classical general relativity, with the role of the charge played by the tidal effects arising from proj...
Downloads: 5
[texts]On the validity of the 5-dimensional Birkhoff theorem: The tale of an exceptional case - Zoltán Keresztes
The 5-dimensional (5d) Birkhoff theorem gives the class of 5d vacuum space-times containing spatial hypersurfaces with cosmological symmetries. This theorem is violated by the 5d vacuum Gergely-Maartens (GM) space-time, which is not a representant of the above class, but contains the static Einstein brane as embedded hypersurface. We prove that the 5d Birkhoff theorem is still satisfied in a weaker sense: the GM space-time is related to the degenerated horizon metric of certain black-hole space-...
Downloads: 11
[texts]The Limits on Cosmological Anisotropies and Inhomogeneities from COBE Data - William Stoeger
Assuming that the cosmological principle holds, Maartens, Ellis and Stoeger (MES) recently constructed a detailed scheme linking anisotropies in the cosmic background radiation (CMB) with anisotropies and inhomogeneities in the large scale structure of the universe and showed how to place limits on those anisotropies and inhomogeneities simply by using CMB quadrupole and octupole limits. First we indicate and discuss the connection between the covariant multipole moments of the temperature aniso...
Downloads: 4
[texts]Gravitational instability on the brane: the role of boundary conditions - Yuri Shtanov
An outstanding issue in braneworld theory concerns the setting up of proper boundary conditions for the brane-bulk system. Boundary conditions (BC's) employing regulatory branes or demanding that the bulk metric be nonsingular have yet to be implemented in full generality. In this paper, we take a different route and specify boundary conditions directly on the brane thereby arriving at a local and closed system of equations (on the brane)...
Downloads: 2
[texts]USPTO Patents Application 10090802 - United States Patent and Trademark Office
Monitoring Unit For Monitoring The Condition Of A Semi-permeable Membrane
Keywords: U.S. Patents
Downloads: 3
[texts]Body image and sport: a qualitative study. (Volume 1) - McCormack, Joanna
This article is from Journal of Eating Disorders, volume 1.AbstractNone
Downloads: 1
[texts]The Sin of Joost Avelingh: A Dutch Story - Maarten Maartens
Book digitized by Google from the library of the New York Public Library and uploaded to the Internet Archive by user tpb.
Downloads: 68
[texts]The Greater Glory - Maarten Maartens
Book digitized by Google and uploaded to the Internet Archive by user tpb.
Downloads: 64
[texts]The healers - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 262
[texts]God's Fool: A Koopstad Story - Maarten Maartens
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 99
[texts]The greater glory: a story of high life, Volume 1 - Maarten Maartens
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 57
[texts]Some Women I Have Known, - Jozua Marius Willem Schwartz, Maarten Maartens
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 114
[texts]Dorothea, a story of the pure in heart - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 23
[texts]The healers [microform] - Maartens, Maarten
Includes advertising matter
Downloads: 153
[texts]The Greater Glory: A Story of High Life - Maarten Maartens
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 196
[texts]Harmen Pols - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 205
[texts]My Lady Nobody; a novel - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 175
[texts]Some Women I Have Known, - Maarten Maartens , Jozua Marius Willem Schwartz
Book digitized by Google and uploaded to the Internet Archive by user tpb.
Downloads: 145
[texts]Her memory; - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 117
[texts]The greater glory ; a story of high life - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 278
[texts]The new religion; a modern novel - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 261
[texts]My Poor Relations: Stories of Dutch Peasant Life (Volume 1) - Maarten Maartens
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 84
[texts]THE GREATER GLORY:A STORY OF HIGH LIFE - MAARTEN MAARTENS
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 86
[texts]My Poor Relations: Stories of Dutch Peasant Life (Volume 1) - Maarten Maartens
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 90
[texts]The greater glory ; a story of high life - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 295
[texts]God's Fool: A Koopstad Story - Maarten Maartens
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 299
[texts]My poor relations; stories of Dutch peasant life - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Keywords: Peasantry
Downloads: 269
[texts]God's fool; a Koopstad story - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 189
[texts]The Sin of Joost Avelingh: A Dutch Story - Maarten Maartens
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 47
[texts]Dorothea, a story of the pure in heart - Maartens, Maarten, 1858-1915
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.
Downloads: 484
[texts]My Poor Relations: Stories of Dutch Peasant Life (Volume 2) - Maarten Maartens
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
Downloads: 87
[texts]Holonomy and gravitomagnetism - Roy Maartens
We analyze parallel transport of a vector field around an equatorial orbit in Kerr and stationary axisymmetric spacetimes that are reflection symmetric about their equatorial planes. As in Schwarzschild spacetime, there is a band structure of holonomy invariance. The new feature introduced by rotation is a shift in the timelike component of the vector, which is the holonomic manifestation of the gravitomagnetic clock effect.
Downloads: 7
[texts]Backreaction effects of dissipation in neutrino decoupling - Roy Maartens
Dissipative effects during neutrino decoupling in the early universe create a small backreaction on the Hubble rate, and lead to a small rise in temperature and entropy. We use a simplified thermo-hydrodynamic model, which provides a causal approximation to kinetic theory, in order to estimate the backreaction effects and the entropy production.
Downloads: 2
[texts]Exact isotropic cosmologies with local fractal number counts - Neil Humphreys
We construct an exact relativistic cosmology in which an inhomogeneous but isotropic local region has fractal number counts and matches to a homogeneous background at a scale of the order of $10^2$ Mpc. We show that Einstein's equations and the matching conditions imply either a nonlinear Hubble law or a very low large-scale density.
Downloads: 4
[texts]The healers (Volume 1) - Maartens, Maarten, 1858-1915

Downloads: 159
[texts]Braneworld Tensor Anisotropies in the CMB - Bernard Leong
Cosmic microwave background (CMB) observations provide in principle a high-precision test of models which are motivated by M theory. We set out the framework of a program to compute the tensor anisotropies in the CMB that are generated in braneworld models. In the simplest approximation, we show the braneworld imprint as a correction to the power spectra for standard temperature and polarization anisotropies.
Downloads: 10
[texts]Symmetries of particle motion - Roy Maartens
We define affine transport lifts on the tangent bundle by associating a transport rule for tangent vectors with a vector field on the base manifold. The aim is to develop tools for the study of kinetic/ dynamical symmetries in relativistic particle motion. The transport lift unifies and generalises the various existing lifted vector fields, with clear geometric interpretations. We find the affine dynamical symmetries of free particle motion, and compare this to previous results and to the altern...
Downloads: 10
[texts]Gravitational waves in preheating - Daniel Tilley
We study the evolution of gravitational waves through the preheating era that follows inflation. The oscillating inflaton drives parametric resonant growth of scalar field fluctuations, and although super-Hubble tensor modes are not strongly amplified, they do carry an imprint of preheating. This is clearly seen in the Weyl tensor, which provides a covariant description of gravitational waves.
Downloads: 9
[texts]Brane-world cosmological perturbations - Roy Maartens
Brane-world models provide a phenomenology that allows us to explore the cosmological consequences of some M theory ideas, and at the same time to use precision cosmology as a test of these ideas. In order to achieve this, we need to understand how brane-world gravity affects cosmological dynamics and perturbations. This introductory review describes the key features of cosmological perturbations in a brane-world universe.
Downloads: 4
[texts]Causal Thermodynamics in Relativity - Roy Maartens
I review the causal relativistic thermodynamics developed by Israel and Stewart, and discuss some applications in cosmology and astrophysics. The lectures begin with an overview of relativistic fluid dynamics (in a covariant formalism) and equilibrium thermodynamics. Causal bulk viscosity in cosmology is considered in detail, including some new results.
Downloads: 12
[texts]Qualitative Viscous Cosmology - A. A. Coley
The Full (non--truncated) Israel--Stewart theory of bulk viscosity is applied to dissipative FRW spacetimes. Dimensionless variables and dimensionless equations of state are used to write the Einstein--thermodynamic equations as a plane autonomous system and the qualitative behaviour of this system is determined. Entropy production in these models is also discussed.
Downloads: 10
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